Source : Webster's Revised Unabridged Dictionary (1913)

Uniat \U"ni*at\, Uniate \U"ni*ate\, n. (Eccl.)
   A member of the Greek Church, who nevertheless acknowledges
   the supremacy of the Pope of Rome; one of the United Greeks.
   Also used adjectively.

Source : WordNet®

Uniat
     n : a member of the Uniat Church [syn: {Uniate}, {Uniate
         Christian}]